x^2+2x-476=0

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Solution for x^2+2x-476=0 equation:


Simplifying
x2 + 2x + -476 = 0

Reorder the terms:
-476 + 2x + x2 = 0

Solving
-476 + 2x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '476' to each side of the equation.
-476 + 2x + 476 + x2 = 0 + 476

Reorder the terms:
-476 + 476 + 2x + x2 = 0 + 476

Combine like terms: -476 + 476 = 0
0 + 2x + x2 = 0 + 476
2x + x2 = 0 + 476

Combine like terms: 0 + 476 = 476
2x + x2 = 476

The x term is 2x.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2x + 1 + x2 = 476 + 1

Reorder the terms:
1 + 2x + x2 = 476 + 1

Combine like terms: 476 + 1 = 477
1 + 2x + x2 = 477

Factor a perfect square on the left side:
(x + 1)(x + 1) = 477

Calculate the square root of the right side: 21.840329668

Break this problem into two subproblems by setting 
(x + 1) equal to 21.840329668 and -21.840329668.

Subproblem 1

x + 1 = 21.840329668 Simplifying x + 1 = 21.840329668 Reorder the terms: 1 + x = 21.840329668 Solving 1 + x = 21.840329668 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = 21.840329668 + -1 Combine like terms: 1 + -1 = 0 0 + x = 21.840329668 + -1 x = 21.840329668 + -1 Combine like terms: 21.840329668 + -1 = 20.840329668 x = 20.840329668 Simplifying x = 20.840329668

Subproblem 2

x + 1 = -21.840329668 Simplifying x + 1 = -21.840329668 Reorder the terms: 1 + x = -21.840329668 Solving 1 + x = -21.840329668 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + x = -21.840329668 + -1 Combine like terms: 1 + -1 = 0 0 + x = -21.840329668 + -1 x = -21.840329668 + -1 Combine like terms: -21.840329668 + -1 = -22.840329668 x = -22.840329668 Simplifying x = -22.840329668

Solution

The solution to the problem is based on the solutions from the subproblems. x = {20.840329668, -22.840329668}

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